2.4.19-pre8-ac5 swsusp panic

2.4.19-pre8-ac5 swsusp panic

[Matthias Andree]

I tried SysRq-D and finally got a kernel "panic: Request while ide driver
is blocked?"

Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
"Probem while suspending", then some "Resume" and finally the panic.

It may be worth noting that one swap partition is on a SCSI drive, and
that my IDE drives were in standby (not idle) mode, i. e. their spindle
motors were stopped.

-- 
Matthias Andree

Re: 2.4.19-pre8-ac5 swsusp panic

[Kasper Dupont]

On my system I'm actually able to suspend and start
the system again using kernel 2.4.19-pre8-ac5. But
there are some problems.

If there is not enough free physical memory it
complaints about not enough free memory and system
continues without suspending. However runing this
program before suspending helps:

#define BUFSIZE (1024*1024*256)
int main()
{
  char *buf = malloc(BUFSIZE);
  int i;
  for (i=0;i<BUFSIZE;i+=4096) buf[i]++;
  return 0;
}

There is plenty of swap space on my system, so that
is not a problem.

When the system has been started again after a
suspend my PS/2 mouse and my serial logins are
all dead. Restarting gpm and sending a SIGHUP to
the serial logins get the connections to live up.
But if I start X all input devices die, but the
screen output is correct and keep getting updated.

Finally ntpd does complain about loosing sync.

-- 
Kasper Dupont -- der bruger for meget tid på usenet.
For sending spam use mailto:razor-report@daimi.au.dk

Re: 2.4.19-pre8-ac5 swsusp panic

[fchabaud]

Le 24 Mai, Matthias Andree a écrit :
> I tried SysRq-D and finally got a kernel "panic: Request while ide driver
> is blocked?"
> 
> Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
> nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
> "Probem while suspending", then some "Resume" and finally the panic.
> 
> It may be worth noting that one swap partition is on a SCSI drive, and
> that my IDE drives were in standby (not idle) mode, i. e. their spindle
> motors were stopped.
> 

AFAIK swap partition under SCSI is not supported for the moment.

--
Florent Chabaud

Re: 2.4.19-pre8-ac5 swsusp panic

[Matthias Andree]

On Sat, 25 May 2002, fchabaud@free.fr wrote:

> Le 24 Mai, Matthias Andree a écrit :
> > I tried SysRq-D and finally got a kernel "panic: Request while ide driver
> > is blocked?"
> > 
> > Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
> > nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
> > "Probem while suspending", then some "Resume" and finally the panic.
> > 
> > It may be worth noting that one swap partition is on a SCSI drive, and
> > that my IDE drives were in standby (not idle) mode, i. e. their spindle
> > motors were stopped.
> 
> AFAIK swap partition under SCSI is not supported for the moment.

Gee. Swsusp should know when it must panic later and not start in the
first place. If that's true: swsusp people, consider this a feature
request ;-)

-- 
Matthias Andree

Re: 2.4.19-pre8-ac5 swsusp panic

[fchabaud]

Le 26 Mai, Matthias Andree a écrit :
> On Sat, 25 May 2002, fchabaud@free.fr wrote:
> 
>> Le 24 Mai, Matthias Andree a écrit :
>> > I tried SysRq-D and finally got a kernel "panic: Request while ide driver
>> > is blocked?"
>> > 
>> > Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
>> > nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
>> > "Probem while suspending", then some "Resume" and finally the panic.
>> > 
>> > It may be worth noting that one swap partition is on a SCSI drive, and
>> > that my IDE drives were in standby (not idle) mode, i. e. their spindle
>> > motors were stopped.
>> 
>> AFAIK swap partition under SCSI is not supported for the moment.
> 
> Gee. Swsusp should know when it must panic later and not start in the
> first place. If that's true: swsusp people, consider this a feature
> request ;-)
> 

I'll do it. Besides I don't imagine it's too difficult to support SCSI,
but I had no time before for doing this.

--
Florent Chabaud
http://www.ssi.gouv.fr | http://fchabaud.free.fr

Re: 2.4.19-pre8-ac5 swsusp panic

[fchabaud]

Le 26 Mai, Pour: matthias.andree@stud.uni-dortmund.de a écrit :
> Le 26 Mai, Matthias Andree a écrit :
>> On Sat, 25 May 2002, fchabaud@free.fr wrote:
>> 
>>> Le 24 Mai, Matthias Andree a écrit :
>>> > I tried SysRq-D and finally got a kernel "panic: Request while ide driver
>>> > is blocked?"
>>> > 
>>> > Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
>>> > nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
>>> > "Probem while suspending", then some "Resume" and finally the panic.
>>> > 
>>> > It may be worth noting that one swap partition is on a SCSI drive, and
>>> > that my IDE drives were in standby (not idle) mode, i. e. their spindle
>>> > motors were stopped.
>>> 
>>> AFAIK swap partition under SCSI is not supported for the moment.
>> 
>> Gee. Swsusp should know when it must panic later and not start in the
>> first place. If that's true: swsusp people, consider this a feature
>> request ;-)
>> 
> 
> I'll do it. Besides I don't imagine it's too difficult to support SCSI,
> but I had no time before for doing this.

To prevent problems with SCSI, maybe something like that ?

Index: suspend.c
===================================================================
RCS file: /home/cvs/linux-src/kernel/Attic/suspend.c,v
retrieving revision 1.3
diff -u -r1.3 suspend.c
--- suspend.c   2002/05/26 11:49:24     1.3
+++ suspend.c   2002/05/26 11:56:25
@@ -745,6 +745,9 @@
 #ifdef CONFIG_BLK_DEV_IDE
        ide_disk_unsuspend();
 #endif
+#ifdef CONFIG_BLK_DEV_SD
+# error  Do not use SCSI swap partition while using software suspend
+#endif
 }
 
 /* Called from process context */
@@ -753,7 +756,7 @@
 #ifdef CONFIG_BLK_DEV_IDE
        ide_disk_suspend();
 #else
-#error Are you sure your disk driver supports suspend?
+# error Are you sure your disk driver supports suspend?
 #endif
        if(!pm_suspend_state) {
                if(pm_send_all(PM_SUSPEND,(void *)3)) {


--
Florent Chabaud         ___________________________________
SGDN/DCSSI/SDS/LTI     | florent.chabaud@polytechnique.org
http://www.ssi.gouv.fr | http://fchabaud.free.fr

Re: 2.4.19-pre8-ac5 swsusp panic

[Pavel Machek]

Hi!

> > I tried SysRq-D and finally got a kernel "panic: Request while ide driver
> > is blocked?"
> > 
> > Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
> > nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
> > "Probem while suspending", then some "Resume" and finally the panic.
> > 
> > It may be worth noting that one swap partition is on a SCSI drive, and
> > that my IDE drives were in standby (not idle) mode, i. e. their spindle
> > motors were stopped.
> > 
> 
> AFAIK swap partition under SCSI is not supported for the moment.

 can you elaborate? swsusp ddoes not careif it is scsi on ide and I had it
running on usb-storage device at one point.
								Pavel

-- 
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

Re: 2.4.19-pre8-ac5 swsusp panic

[fchabaud]

Le 27 Mai, Pavel Machek a écrit :
> Hi!
> 
>> > I tried SysRq-D and finally got a kernel "panic: Request while ide driver
>> > is blocked?"
>> > 
>> > Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
>> > nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
>> > "Probem while suspending", then some "Resume" and finally the panic.
>> > 
>> > It may be worth noting that one swap partition is on a SCSI drive, and
>> > that my IDE drives were in standby (not idle) mode, i. e. their spindle
>> > motors were stopped.
>> > 
>> 
>> AFAIK swap partition under SCSI is not supported for the moment.
> 
>  can you elaborate? swsusp ddoes not careif it is scsi on ide and I had it
> running on usb-storage device at one point.
> 								Pavel
> 

Well we haven't the equivalent to ide_disk_(un)suspend. I agree that
this should be sufficient to make it work, but SCSI may be a little more
difficult to patch.

--
Florent Chabaud         ___________________________________
SGDN/DCSSI/SDS/LTI     | florent.chabaud@polytechnique.org
http://www.ssi.gouv.fr | http://fchabaud.free.fr

Re: 2.4.19-pre8-ac5 swsusp panic

[Pavel Machek]

Hi!

> >> > I tried SysRq-D and finally got a kernel "panic: Request while ide driver
> >> > is blocked?"
> >> > 
> >> > Before that, I saw "waiting for tasks to stop... suspending kreiserfsd",
> >> > nfsd exiting, "Freeing memory", "Syncing disks beofre copy", then some
> >> > "Probem while suspending", then some "Resume" and finally the panic.
> >> > 
> >> > It may be worth noting that one swap partition is on a SCSI drive, and
> >> > that my IDE drives were in standby (not idle) mode, i. e. their spindle
> >> > motors were stopped.
> >> > 
> >> 
> >> AFAIK swap partition under SCSI is not supported for the moment.
> > 
> >  can you elaborate? swsusp ddoes not careif it is scsi on ide and I had it
> > running on usb-storage device at one point.
> > 								Pavel
> > 
> 
> Well we haven't the equivalent to ide_disk_(un)suspend. I agree that
> this should be sufficient to make it work, but SCSI may be a little more
> difficult to patch.

Yup, right. Right way to do that is using pci power interface. It
hopefully is strong enough to do that in 2.4, and it will magically
work in 2.5 too.

But for that usb-storage, usb already contains pm-related code, so it
should just work.
								Pavel
-- 
Casualities in World Trade Center: ~3k dead inside the building,
cryptography in U.S.A. and free speech in Czech Republic.

Re: 2.4.19-pre8-ac5 swsusp panic

[Pavel Machek]

Hi!

> I tried SysRq-D and finally got a kernel "panic: Request while ide driver
> is blocked?"

sysrq-D showed to be buggy in 2.5. You might want to do echo 4 > 
/proc/acpi/sleep instead.

-- 
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.